Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0a03db5701433ce…

MALICIOUS

PDF

42.7 KB Created: 2020-08-22 18:24:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cedcce6ab5b5d2bfa4fadf9553a229ad SHA-1: cd61d785224cd031becbf72e8a52ebaf2c75fbc2 SHA-256: d0a03db5701433cea2692b5f5b2f89cf96902ff54118ed700bee1c22a0e156a4
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains the same URL and a list of other URLs hosted on cdn.shopify.com and files.guidingsuccess.org, suggesting a link farm or redirection scheme. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=coloring+worksheets+for+middle+school+students
    • http://files.guidingsuccess.org/uploads/1/3/0/7/130775402/kekusepemudanomavob.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63912397784.pdf
    • https://cdn.shopify.com/s/files/1/0434/4391/2854/files/80615876713.pdf
    • https://cdn.shopify.com/s/files/1/0431/3251/8554/files/20376810685.pdf
    • https://cdn.shopify.com/s/files/1/0432/4818/9595/files/mala_absorcion_intestinal.pdf
    • https://cdn.shopify.com/s/files/1/0434/6940/6360/files/bsc_agriculture_notes_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/7798/3653/files/10429318735.pdf
    • https://cdn.shopify.com/s/files/1/0435/3448/3616/files/last_six_months_current_affairs_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0437/8276/6743/files/astigmatismo_miopico_compuesto.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51108684678.pdf
    • https://cdn.shopify.com/s/files/1/0433/9970/8821/files/41272990993.pdf
    • https://cdn.shopify.com/s/files/1/0431/9176/3105/files/adobe_reader_xi_11._0_09_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/9244/3303/files/30947966756.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b1d.bin
b251123d66d8df93a021fb95bb7d057cb61bdf5dc14df96f7eb6c03fdd9267c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B1D 5288 bytes
font_01_sfnt_off00006cff.bin
741f7026b8a0414b93cb914972491105a299d75bdacee9fe1767555e928647f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CFF 10176 bytes
font_02_sfnt_off00008f93.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F93 4324 bytes